public void Add(LuaValue key, LuaValue value)
{
CheckDisposed();
if (key.IsNil())
{
throw new ArgumentNullException("key");
}
Runtime.Push(this);
Runtime.Push(key);
LuaApi.lua_gettable(Runtime.LuaState, -2);
if (LuaApi.lua_type(Runtime.LuaState, -1) != LuaApi.LuaType.Nil)
{
// Slot is occupied.
LuaApi.lua_pop(Runtime.LuaState, 2);
throw new ArgumentException("Table already contains given key.", "key");
}
// Slot is unoccupied. Leave the nil there for now, we'll pop ALL the things at the end.
Runtime.Push(key);
Runtime.Push(value);
LuaApi.lua_settable(Runtime.LuaState, -4);
// Pop table and nil value.
LuaApi.lua_pop(Runtime.LuaState, 2);
}
public LuaValue this[LuaValue key] {
get {
CheckDisposed();
var top = LuaApi.lua_gettop(Runtime.LuaState);
Runtime.Push(this);
Runtime.Push(key);
LuaApi.lua_gettable(Runtime.LuaState, -2);
LuaValue val;
try {
val = Runtime.Wrap(-1);
} finally {
LuaApi.lua_settop(Runtime.LuaState, top);
}
return(val);
}
set {
CheckDisposed();
// Lua allows one to query the nil index (always returning nil) but never to set it.
if (key.IsNil())
{
throw new ArgumentNullException("key");
}
var top = LuaApi.lua_gettop(Runtime.LuaState);
Runtime.Push(this);
Runtime.Push(key);
Runtime.Push(value);
LuaApi.lua_settable(Runtime.LuaState, -3);
LuaApi.lua_settop(Runtime.LuaState, top);
}
}